Alvarez-Mora, Raúl, William Cetzal-Ix, Saikat Kumar Basu, Eliana Noguera-Savelli, Noel A. González-Valdivia, Jesús F. Martínez-Puc, Peiman Zandi, and Katarzyna Możdżeń. 2016. “Orchid Diversity at Cuetzalan Del Progreso, Puebla, Mexico – Anthropogenic Threats and Potential for Organic Production for Conservation Purposes”. Annales Universitatis Paedagogicae Cracoviensis Studia Naturae 1 (1):7-23. https://aupcstudianaturae.uken.krakow.pl/article/view/5374.